type: u32
help: Interval between hello packets
default: 10
syntax:expression: $VAR(@) >= 1 && $VAR(@) <= 65535; "Must be between 1-65535"
val_help: u32:1-65535; Interval between OSPFv3 hello packets in seconds (default 10)

update: vtysh -c "configure terminal" -c "interface $IFNAME" \
          -c "ipv6 ospf6 hello-interval $VAR(@)"
delete: vtysh -c "configure terminal" -c "interface $IFNAME" \
          -c "ipv6 ospf6 hello-interval 10"